gistfile1.java

public class InjectStep<S> extends FilterStep<S> implements TraverserSource {

    private final List<S> injections;

    public InjectStep(final Traversal traversal, final S... injections) {
        super(traversal);
        this.setPredicate(t -> true);
        this.injections = Arrays.asList(injections);

    }

    public void generateTraverserIterator(final boolean trackPaths) {
        if (trackPaths)
            this.addStarts(new TraverserIterator<>(this, this.injections.iterator()));
        else
            this.addStarts(new TraverserIterator<>(this.injections.iterator()));
    }

    public void clear() {
        this.starts.clear();
    }
}